An article from Insight Crime on 18 August reported that seizures of coltan in Colombia have shown the complex networks used by armed groups to smuggle the valuable mineral from illegal mines across the border in Venezuela. Coltan, also known as “blue gold” is rich in tantalum, a metal used in electronics, including cellphones and laptops.
https://insightcrime.org/news/colombia-backdoor-for-venezuelan-coltan/
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